Verification Testing of Body Forces due to a Prescribed Angular Velocity in DYNA3D/Paradyn

Technical Report · Thu Jul 06 04:00:00 EDT 2023

DOI:https://doi.org/10.2172/1989989· OSTI ID:1989989

Zoller, Miklos Johann ^[1]

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1. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

This report documents the verification testing and regression testing done on a new feature in DYNA3D/Paradyn, which allows users to prescribe body force loads based upon an angular velocity. This feature is unique in that the direction of the angular velocity vector follows the unit vector formed by two coordinate points associated with two nodes or the average coordinates of two separate small collection of nodes. The angular velocity direction will follow the directional vector defined by these nodes while the angular velocity magnitude is defined by a load curve. A simple single element verification test was performed to determine the correct implementation of this feature, and two separate regression tests were added to the DYNA3D Software Quality Assur ance test suite. The nodal positions, velocities, and accelerations from the solution of the single element verification test compare well to analytically derived values of those nodal quantities. The regression tests serve as good examples of this new feature’s use case and were consequently added to the SQA test suite to ensure that further modifications of the DYNA3D source code do not unintentionally change the generated baseline answers.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC52-07NA27344
• OSTI ID: 1989989
• Report Number(s): LLNL--TR-851544; 1077779
• Country of Publication: United States
• Language: English

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